Perhaps you should try some spelling variations:
trien nhan » trien nha, tri nhan, trien khai
nhan khong » nhan thong, nhanh chong, nganh khong
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoi » sach doi, sach moi, cach thoi
cuu long » cuu tong, cuu nang
cuu cong » cua cong, thu cong, cac cong
tu sach » thu sach, su sach, te sach
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoi dap, nghien ((cuu long) or (cuu cong)) trien nhan khong hoc xa hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi dap, nghien ((cuu long) OR (cuu cong)) trien nhan khong hoc xa hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien ((cuu long) or (cuu cong)) trien nhan khong hoc xa hoi va nhan va*.